<template>
	<el-container class="main-container">
		<!-- 头部区域 -->
		<el-header>
			<!-- 左侧的 logo -->
			<img src="../../assets/images/logo.png" alt="" />
			<!-- 右侧的菜单 -->
			<el-menu class="el-menu-top" mode="horizontal" background-color="#23262E" text-color="#fff"
				active-text-color="#409EFF">
				<el-submenu index="1">
					<template slot="title">
						<!-- 头像 -->
						<img :src="userInfo.user_pic" alt="" class="avatar" v-if="userInfo.user_pic" />
						<img src="../../assets/logo.png" alt="" class="avatar" v-else />
						<span>个人中心</span>
					</template>
					<el-menu-item index="1-1"><i class="el-icon-s-operation"></i>基本资料</el-menu-item>
					<el-menu-item index="1-2"><i class="el-icon-camera"></i>更换头像</el-menu-item>
					<el-menu-item index="1-3"><i class="el-icon-key"></i>重置密码</el-menu-item>
				</el-submenu>
				<el-menu-item index="2" @click="outLogin"><i class="el-icon-switch-button"></i>退出</el-menu-item>
			</el-menu>
		</el-header>
		<el-container>
			<!-- 左侧边栏区域 -->
			<el-aside width="200px">
				<div class="user-box">
					<img :src="userInfo.user_pic" alt="" class="avatar" v-if="userInfo.user_pic" />
					<img src="../../assets/logo.png" alt="" class="avatar" v-else />
					<span>欢迎 {{ userInfo.nickname || userInfo.username}}</span>
				</div>
				<el-menu default-active="/home" class="el-menu-vertical-demo" background-color="#23262E"
					text-color="#fff" active-text-color="#409EFF" unique-opened router>
					<template v-for="item in menus">
						<!-- 不包含子菜单的“一级菜单” -->
						<el-menu-item :index="item.indexPath" :key="item.indexPath" v-if="!item.children">
							<i :class="item.icon"></i>{{ item.title }}
						</el-menu-item>
						<!-- 包含子菜单的“一级菜单” -->
						<el-submenu :index="item.indexPath" :key="item.indexPath" v-else>
							<template slot="title">
								<i :class="item.icon"></i>
								<span>{{ item.title }}</span>
							</template>
							<!-- 循环渲染“二级菜单” -->
							<el-menu-item :index="subItem.indexPath" v-for="subItem in item.children"
								:key="subItem.indexPath">
								<i :class="subItem.icon"></i>{{ subItem.title }}
							</el-menu-item>
						</el-submenu>
					</template>
				</el-menu>
			</el-aside>
			<el-container>
				<!-- 页面主体区域 -->
				<el-main>
					<router-view></router-view>
				</el-main>
				<!-- 底部 footer 区域 -->
				<el-footer>© www.itheima.com - 黑马程序员</el-footer>
			</el-container>
		</el-container>
	</el-container>
</template>

<script>
	import {
		mapState
	} from 'vuex'
	export default {
		name: 'Main',
		computed: {
			...mapState(['userInfo', 'token'])
		},
		data() {
			return {
				// 保存左侧菜单栏数据
				menus: []
			}
		},
		created() {
			if (this.token) {
				// 如果有token，就请求数据
				this.initMenus()
				this.$store.dispatch('initUserInfo')
			} else {
				// 如果没有token，就强制跳转到登录页面
				this.$router.push('/login')
			}
		},
		methods: {
			// 初始化左侧菜单的数据
			async initMenus() {
				const {
					data: res
				} = await this.$http.get('/my/menus', {
					headers: {
						Authorization: this.$store.state.token
					}
				})
				if (res.code === 0) {
					this.menus = res.data
				}
			},
			// 退出按钮
			outLogin() {
				this.$confirm('确定要退出吗?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).then(() => {
					// 情况token
					this.$store.commit('uadateToken', '')
					// 跳转到登录页面
					this.$router.push('/login')
					this.$message({
						type: 'success',
						message: '退出成功!'
					});
				}).catch(() => {
					this.$message({
						type: 'info',
						message: '已取消退出'
					});
				});
			}
		}
	}
</script>

<style lang="less" scoped>
	.main-container {
		height: 100%;

		.el-header,
		.el-aside {
			background-color: #23262e;
		}

		.el-header {
			padding: 0;
			display: flex;
			justify-content: space-between;
		}

		.el-main {
			overflow-y: scroll;
			height: 0;
			background-color: #F2F2F2;
		}

		.el-footer {
			background-color: #eee;
			font-size: 12px;
			display: flex;
			justify-content: center;
			align-items: center;
		}
	}

	.avatar {
		border-radius: 50%;
		width: 35px;
		height: 35px;
		background-color: #fff;
		margin-right: 10px;
		object-fit: cover;
	}

	// 左侧边栏用户信息区域
	.user-box {
		height: 70px;
		display: flex;
		justify-content: center;
		align-items: center;
		border-top: 1px solid #000;
		border-bottom: 1px solid #000;
		user-select: none;

		img {
			width: 35px;
			height: 35px;
			border-radius: 50%;
			background-color: #fff;
			margin-right: 15px;
			object-fit: cover;
		}

		span {
			color: white;
			font-size: 12px;
		}
	}

	// 侧边栏菜单的样式
	.el-aside {

		.el-submenu,
		.el-menu-item {
			width: 200px;
			user-select: none;
		}
	}
</style>
